4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 6-(((((4-hydroxy-1,5-naphthyridin-3-yl)carbonyl)amino)phenylacetyl)amino)-3,3-dimethyl-7-oxo-, monosodium salt, (2S-(2alpha,5alpha,6beta(R*)))- 74591-00-7